Can't Open VB Editor With User Created Shapes Present

[SteveM]

I created some custom shapes using some pix that I inserted from a
local directory. When they are present on a page, Visio will not let
me access the VB editor. The editor is accessible when I open a new
drawing and add built-in shapes.

I think I have relaxed every restriction possible in the Trusted
Sources dialogs.

All content was produced on the same machine. I am running in
Developer mode with full Trust set for internal projects.

Environment is XP, Office 2003, Visio Professional 2007

This is the latest issue to cause me to chew up 3 months of Prilosec
OTC in 3 days.

Any kind advice?

Thanks,

SteveM